/*generico*/
body{font-family:Verdana, Arial, Helvetica, sans-serif; font-size:11px;}
a{text-decoration:none; color:#000;}

/*estructura*/
#exterior{border:1px solid #ccc; width:600px; margin:0px auto; padding:10px;}
	#header{height:80px;}
		#header h1{border-bottom:4px solid #ccc; text-align:center; display:block;}
		#header ul{list-style:none; margin:0px; padding:0px;}
		#header li{}
			#header li a{display:block; padding:5px; border:1px solid #ccc; float:left; margin-right:10px;}
			#header li a:hover{background:#ccc; border:1px solid #000;}